Spread in parent and requires FlatEntity.__universal (#17753)

# Introduction
Requiring the spreaded `__universal` record that aggregates all the
universal identifier ( relations fk and aggregators ) of an entity to
its root

It's blockin for https://github.com/twentyhq/twenty/pull/17687 to be
finalized because if we don't we would have to migrated all related
entities at once in order for them to always have the universal
properties

## `resolveEntityRelationUniversalIdentifiers`
Introduced `resolveEntityRelationUniversalIdentifiers` a centralized
utility that resolves foreign key IDs to universal identifiers using
ALL_METADATA_RELATIONS metadata. It provides strict typing for both
input (foreign keys) and output (universal identifiers), with
nullability dynamically inferred from entity relation types.
Strictly and dynamically typed for both output and input

To do so added a new type and const/runtime grain to
ALL_METADATA_RELATIONS `isNullable`to many-to-one entries, derived from
the entity relation property types. And fixed incorrectly typed typeorm
entities

### Usage
```ts
  const {
    availabilityObjectMetadataUniversalIdentifier,
    frontComponentUniversalIdentifier,
  } = resolveEntityRelationUniversalIdentifiers({
    metadataName: 'commandMenuItem',
    foreignKeyValues: {
      availabilityObjectMetadataId:
        createCommandMenuItemInput.availabilityObjectMetadataId,
      frontComponentId: createCommandMenuItemInput.frontComponentId,
    },
    flatEntityMaps: { flatObjectMetadataMaps, flatFrontComponentMaps },
  });
```

packages/twenty-server/src/engine/metadata-modules/flat-page-layout/utils/from-create-page-layout-input-to-flat-page-layout-to-create.util.ts

@@ -1,6 +1,9 @@
 import { trimAndRemoveDuplicatedWhitespacesFromObjectStringProperties } from 'twenty-shared/utils';
 import { v4 } from 'uuid';
 
+import { type FlatApplication } from 'src/engine/core-modules/application/types/flat-application.type';
+import { type AllFlatEntityMaps } from 'src/engine/metadata-modules/flat-entity/types/all-flat-entity-maps.type';
+import { resolveEntityRelationUniversalIdentifiers } from 'src/engine/metadata-modules/flat-entity/utils/resolve-entity-relation-universal-identifiers.util';
 import { type FlatPageLayout } from 'src/engine/metadata-modules/flat-page-layout/types/flat-page-layout.type';
 import { type CreatePageLayoutInput } from 'src/engine/metadata-modules/page-layout/dtos/inputs/create-page-layout.input';
 import { PageLayoutType } from 'src/engine/metadata-modules/page-layout/enums/page-layout-type.enum';
@@ -8,13 +11,14 @@ import { PageLayoutType } from 'src/engine/metadata-modules/page-layout/enums/pa
 export type FromCreatePageLayoutInputToFlatPageLayoutToCreateArgs = {
   createPageLayoutInput: CreatePageLayoutInput;
   workspaceId: string;
-  workspaceCustomApplicationId: string;
-};
+  flatApplication: FlatApplication;
+} & Pick<AllFlatEntityMaps, 'flatObjectMetadataMaps'>;
 
 export const fromCreatePageLayoutInputToFlatPageLayoutToCreate = ({
   createPageLayoutInput: rawCreatePageLayoutInput,
   workspaceId,
-  workspaceCustomApplicationId,
+  flatApplication,
+  flatObjectMetadataMaps,
 }: FromCreatePageLayoutInputToFlatPageLayoutToCreateArgs): FlatPageLayout => {
   const createPageLayoutInput =
     trimAndRemoveDuplicatedWhitespacesFromObjectStringProperties(
@@ -25,18 +29,31 @@ export const fromCreatePageLayoutInputToFlatPageLayoutToCreate = ({
   const createdAt = new Date().toISOString();
   const pageLayoutId = v4();
 
+  const { objectMetadataUniversalIdentifier } =
+    resolveEntityRelationUniversalIdentifiers({
+      metadataName: 'pageLayout',
+      foreignKeyValues: {
+        objectMetadataId: createPageLayoutInput.objectMetadataId,
+      },
+      flatEntityMaps: { flatObjectMetadataMaps },
+    });
+
   return {
     id: pageLayoutId,
     name: createPageLayoutInput.name,
     type: createPageLayoutInput.type ?? PageLayoutType.RECORD_PAGE,
     objectMetadataId: createPageLayoutInput.objectMetadataId ?? null,
+    objectMetadataUniversalIdentifier,
     workspaceId,
     createdAt,
     updatedAt: createdAt,
     deletedAt: null,
     universalIdentifier: pageLayoutId,
-    applicationId: workspaceCustomApplicationId,
+    applicationId: flatApplication.id,
+    applicationUniversalIdentifier: flatApplication.universalIdentifier,
     tabIds: [],
+    tabUniversalIdentifiers: [],
     defaultTabToFocusOnMobileAndSidePanelId: null,
+    defaultTabToFocusOnMobileAndSidePanelUniversalIdentifier: null,
   };
 };

packages/twenty-server/src/engine/metadata-modules/flat-page-layout/utils/from-update-page-layout-input-to-flat-page-layout-to-update-or-throw.util.ts

@@ -4,8 +4,10 @@ import {
   isDefined,
 } from 'twenty-shared/utils';
 
-import { FLAT_PAGE_LAYOUT_EDITABLE_PROPERTIES } from 'src/engine/metadata-modules/flat-page-layout/constants/flat-page-layout-editable-properties.constant';
+import { type AllFlatEntityMaps } from 'src/engine/metadata-modules/flat-entity/types/all-flat-entity-maps.type';
 import { findFlatEntityByIdInFlatEntityMaps } from 'src/engine/metadata-modules/flat-entity/utils/find-flat-entity-by-id-in-flat-entity-maps.util';
+import { resolveEntityRelationUniversalIdentifiers } from 'src/engine/metadata-modules/flat-entity/utils/resolve-entity-relation-universal-identifiers.util';
+import { FLAT_PAGE_LAYOUT_EDITABLE_PROPERTIES } from 'src/engine/metadata-modules/flat-page-layout/constants/flat-page-layout-editable-properties.constant';
 import { type FlatPageLayoutMaps } from 'src/engine/metadata-modules/flat-page-layout/types/flat-page-layout-maps.type';
 import { type FlatPageLayout } from 'src/engine/metadata-modules/flat-page-layout/types/flat-page-layout.type';
 import { type UpdatePageLayoutInput } from 'src/engine/metadata-modules/page-layout/dtos/inputs/update-page-layout.input';
@@ -23,10 +25,11 @@ export type UpdatePageLayoutInputWithId = {
 export const fromUpdatePageLayoutInputToFlatPageLayoutToUpdateOrThrow = ({
   updatePageLayoutInput: rawUpdatePageLayoutInput,
   flatPageLayoutMaps,
+  flatObjectMetadataMaps,
 }: {
   updatePageLayoutInput: UpdatePageLayoutInputWithId;
   flatPageLayoutMaps: FlatPageLayoutMaps;
-}): FlatPageLayout => {
+} & Pick<AllFlatEntityMaps, 'flatObjectMetadataMaps'>): FlatPageLayout => {
   const { id: pageLayoutToUpdateId } = extractAndSanitizeObjectStringFields(
     rawUpdatePageLayoutInput,
     ['id'],
@@ -49,9 +52,25 @@ export const fromUpdatePageLayoutInputToFlatPageLayoutToUpdateOrThrow = ({
     FLAT_PAGE_LAYOUT_EDITABLE_PROPERTIES,
   );
 
-  return mergeUpdateInExistingRecord({
+  const flatPageLayoutToUpdate = mergeUpdateInExistingRecord({
     existing: existingFlatPageLayoutToUpdate,
     properties: FLAT_PAGE_LAYOUT_EDITABLE_PROPERTIES,
     update: updatedEditableFieldProperties,
   });
+
+  if (updatedEditableFieldProperties.objectMetadataId !== undefined) {
+    const { objectMetadataUniversalIdentifier } =
+      resolveEntityRelationUniversalIdentifiers({
+        metadataName: 'pageLayout',
+        foreignKeyValues: {
+          objectMetadataId: flatPageLayoutToUpdate.objectMetadataId,
+        },
+        flatEntityMaps: { flatObjectMetadataMaps },
+      });
+
+    flatPageLayoutToUpdate.objectMetadataUniversalIdentifier =
+      objectMetadataUniversalIdentifier;
+  }
+
+  return flatPageLayoutToUpdate;
 };

packages/twenty-server/src/engine/metadata-modules/flat-page-layout/utils/transform-page-layout-entity-to-flat-page-layout.util.ts

@@ -70,14 +70,11 @@ export const transformPageLayoutEntityToFlatPageLayout = ({
     tabIds: pageLayoutEntity.tabs.map((tab) => tab.id),
     defaultTabToFocusOnMobileAndSidePanelId:
       pageLayoutEntity.defaultTabToFocusOnMobileAndSidePanelId,
-    __universal: {
-      universalIdentifier: pageLayoutEntity.universalIdentifier,
-      applicationUniversalIdentifier,
-      objectMetadataUniversalIdentifier,
-      tabUniversalIdentifiers: pageLayoutEntity.tabs.map(
-        (tab) => tab.universalIdentifier,
-      ),
-      defaultTabToFocusOnMobileAndSidePanelUniversalIdentifier,
-    },
+    applicationUniversalIdentifier,
+    objectMetadataUniversalIdentifier,
+    tabUniversalIdentifiers: pageLayoutEntity.tabs.map(
+      (tab) => tab.universalIdentifier,
+    ),
+    defaultTabToFocusOnMobileAndSidePanelUniversalIdentifier,
   };
 };